Graphical representation of the results of correlation analyses in the Ensure and water cues groups. Collapsed values for the expression of each of the immediate early genes that were normalized to regional control averages were used to calculate correlations within each group so long as there was a significant mean difference between the groups for each individual gene. Correlations that were significant are color-coded by the range in which their Pearson product moment value (r) lies (see key). Correlations that were not significant are indicated by light gray shading. (A) Correlations between regional immediate early gene expression and total horizontal activity in the water cues group (left column) and the Ensure cues group (right column). (B) Correlations between regional immediate early gene expression and plasma corticosterone in the water cues group (left column) and the Ensure cues group (right column). (C) Interregional gene expression correlations in the water cues group (lower left half) and the Ensure cues group (upper right half). NA designates a region for which correlations were not performed due to a lack of significant differences between the groups in all of the genes analyzed. The lack of interregional gene-expression correlations within the diencephalon most likely represents a decrease in the statistical power of the correlation analyses, as only a subset of the genes exhibited significant differences in expression within these regions. For abbreviations, see legend to Figure 1.